单项选择题

A．Because it changes color in a regular 24-hour rhythm.
B．Because it changes color in response to the sun’’s rays.
C．Because it constantly changes color.
D．Because it changes color every hour.
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单项选择题
A．2.B．3.C．4.D．5.
A．2.
B．3.
C．4.
D．5.
单项选择题
A．Because the temperature can climb to 85° Fahrenheit.B．Because the temperature can climb to 95° Fahrenheit.C．Because the temperature can climb to 75° Fahrenheit.D．Because the temperature can climb to 105° Fahrenheit.
A．Because the temperature can climb to 85° Fahrenheit.
B．Because the temperature can climb to 95° Fahrenheit.
C．Because the temperature can climb to 75° Fahrenheit.
D．Because the temperature can climb to 105° Fahrenheit.
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